Since reuniting in 2005, when the band members were around age forty, Massachusetts rock band Dinosaur Jr. has released a series of albums that are, incredibly, of the same quality as their pioneering output from the 1980s and early ’90s, when they were considered forerunners to grunge. On their latest album, it’s clear that the well of inspiration they discovered in the mid-2000s has not yet been tapped out. Frontman and guitarist J. Mascis coaxes new tones out of his guitar to lead “Goin Down” and concocts airtight melodies on songs such as the blistering “Tiny.” Every song features a strong guitar solo, but “Be a Part” stands above the rest by starting as a slow-building ballad before Mascis rips out a nimble-fingered, Spanish-influenced effort. Dinosaur Jr.’s resurgence as scene godfathers who’ve still got it recalls Neil Young’s similar middle-age comeback in the late ’80s, and indeed, Dinosaur Jr.’s music often sounds very similar to Young’s band Crazy Horse. “Lost All Day” conjures images of Young and his bandmates hunched in a circle, stomping their feet and banging on their guitars until the strings break. Dinosaur Jr.’s music can feel monochromatic over the course of a full album, but it’s ripe for an age where people listen to songs on YouTube or other streaming services — so long as you listen to it loud.